linux-toradex.git/include/soc/fsl, branch v6.11-rc2

soc: fsl: cpm1: qmc: Introduce qmc_chan_count_phandles()

2024-07-04T11:24:59+00:00

No function in the QMC API is available to get the number of phandles
present in a phandle list.

Fill this lack introducing qmc_chan_count_phandles().

Signed-off-by: Herve Codina 
Link: https://patch.msgid.link/20240701113038.55144-9-herve.codina@bootlin.com
Signed-off-by: Mark Brown

soc: fsl: cpm1: qmc: Introduce functions to get a channel from a phandle list

2024-07-04T11:24:58+00:00

qmc_chan_get_byphandle() and the resource managed version retrieve a
channel from a simple phandle.

Extend the API and introduce qmc_chan_get_byphandles_index() and the
resource managed version in order to retrieve a channel from a phandle
list using the provided index to identify the phandle in the list.

Also update qmc_chan_get_byphandle() and the resource managed version to
use qmc_chan_get_byphandles_index() and so avoid code duplication.

Signed-off-by: Herve Codina 
Link: https://patch.msgid.link/20240701113038.55144-8-herve.codina@bootlin.com
Signed-off-by: Mark Brown

crypto: mxs-dcp: Add support for hardware-bound keys

2024-05-09T15:29:03+00:00

DCP (Data Co-Processor) is able to derive private keys for a fused
random seed, which can be referenced by handle but not accessed by
the CPU. Similarly, DCP is able to store arbitrary keys in four
dedicated key slots located in its secure memory area (internal SRAM).
These keys can be used to perform AES encryption.

Expose these derived keys and key slots through the crypto API via their
handle. The main purpose is to add DCP-backed trusted keys. Other
use cases are possible too (see similar existing paes implementations),
but these should carefully be evaluated as e.g. enabling AF_ALG will
give userspace full access to use keys. In scenarios with untrustworthy
userspace, this will enable en-/decryption oracles.

Co-developed-by: Richard Weinberger 
Signed-off-by: Richard Weinberger 
Co-developed-by: David Oberhollenzer 
Signed-off-by: David Oberhollenzer 
Signed-off-by: David Gstir 
Acked-by: Herbert Xu 
Reviewed-by: Jarkko Sakkinen 
Signed-off-by: Jarkko Sakkinen

soc: fsl: cpm1: qmc: Introduce functions to change timeslots at runtime

2023-12-12T09:29:20+00:00

Introduce qmc_chan_{get,set}_ts_info() function to allow timeslots
modification at runtime.

The modification is provided using qmc_chan_set_ts_info() and will be
applied on next qmc_chan_start().
qmc_chan_set_ts_info() must be called with the channel rx and/or tx
stopped.

Signed-off-by: Herve Codina 
Reviewed-by: Christophe Leroy 
Link: https://lore.kernel.org/r/20231205152116.122512-18-herve.codina@bootlin.com

soc: fsl: cpm1: qmc: Add support for child devices

2023-12-12T09:29:20+00:00

QMC child devices support is needed to avoid orphan DT nodes that use a
simple DT phandle to reference a QMC channel.

Allow to instantiate child devices and also extend the API to get the
qmc_chan using a child device.

Signed-off-by: Herve Codina 
Link: https://lore.kernel.org/r/20231205152116.122512-7-herve.codina@bootlin.com

soc: fsl: cpm1: qmc: Extend the API to provide Rx status

2023-12-12T09:29:20+00:00

In HDLC mode, some status flags related to the data read transfer can be
set by the hardware and need to be known by a QMC consumer for further
analysis.

Extend the API in order to provide these transfer status flags at the
read complete() call.

In TRANSPARENT mode, these flags have no meaning. Keep only one read
complete() API and update the consumers working in transparent mode.
In this case, the newly introduced flags parameter is simply unused.

Signed-off-by: Herve Codina 
Reviewed-by: Christophe Leroy 
Link: https://lore.kernel.org/r/20231205152116.122512-5-herve.codina@bootlin.com

docs: move powerpc under arch

2023-10-10T19:35:55+00:00

and fix all in-tree references.

Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy.

Signed-off-by: Costa Shulyupin 
Acked-by: Michael Ellerman 
Signed-off-by: Jonathan Corbet 
Link: https://lore.kernel.org/r/20230826165737.2101199-1-costa.shul@redhat.com

soc: fsl: cpm1: Add support for QMC

2023-03-05T23:37:03+00:00

The QMC (QUICC Multichannel Controller) emulates up to 64
channels within one serial controller using the same TDM
physical interface routed from the TSA.

It is available in some	PowerQUICC SoC such as the
MPC885 or MPC866.

It is also available on some Quicc Engine SoCs.
This current version support CPM1 SoCs only and some
enhancement are needed to support Quicc Engine SoCs.

Signed-off-by: Herve Codina 
Acked-by: Li Yang 
Reviewed-by: Christophe Leroy 
Link: https://lore.kernel.org/r/20230217145645.1768659-7-herve.codina@bootlin.com
Signed-off-by: Mark Brown

soc: fsl: qe: request pins non-exclusively

2022-12-05T17:19:34+00:00

Commit 84582f9ed090 ("soc: fsl: qe: Avoid using gpio_to_desc()") changed
qe_pin_request() to request and hold GPIO corresponding to a given pin.
Unfortunately this does not work, as fhci-hcd requests these GPIOs
first, befor calling qe_pin_request() (see
drivers/usb/host/fhci-hcd.c::of_fhci_probe()).
To fix it change qe_pin_request() to request GPIOs non-exclusively, and
free them once the code determines GPIO controller and offset for each
GPIO/pin.

Also reaching deep into gpiolib implementation is not the best idea. We
should either export gpio_chip_hwgpio() or keep converting to the global
gpio numbers space until we fix the driver to implement proper pin
control.

Fixes: 84582f9ed090 ("soc: fsl: qe: Avoid using gpio_to_desc()")
Signed-off-by: Dmitry Torokhov 
Reviewed-by: Andy Shevchenko 
Link: https://lore.kernel.org/r/Y400YXnWBdz1e/L5@google.com
Signed-off-by: Arnd Bergmann

soc: fsl: qbman: Add CGR update function

2022-09-05T13:27:39+00:00

This adds a function to update a CGR with new parameters. qman_create_cgr
can almost be used for this (with flags=0), but it's not suitable because
it also registers the callback function. The _safe variant was modeled off
of qman_cgr_delete_safe. However, we handle multiple arguments and a return
value.

Signed-off-by: Sean Anderson 
Acked-by: Camelia Groza 
Signed-off-by: David S. Miller